Double-wall paper container



Feb. 6, 1951 c. BARBIERI DOUBLE-WALL PAPER CONTAINER Original FiledMarch 17, 1944 Came: gage/Eel MW. w

Patented Feb. 6, 1951 DOUBLE-WALL PAPER CONTAINER Cesare Barbieri, NewYork, N. -Y., assignor-to- Dixie Cup Company, Chicago, 111., acorporation of Delaware Original application March 17,1941, Serial No.

526,874. Divided and this application February-27,1947, SeriaiNo.731,222

-. invention relates to improvements in a double-wall paper container ofthe generalcharacter of a fiat bottomcdypaperdrinking cup,'.the'

3 cl m ,(01. 229-55;

' In the manufacture of a paper container,

economy is an essential, both as to the amount of material used and themanner in which the mateinvention being highly desirable for use in conrnection-with' the serving or carryingof hot or cold liquid orsubstances, such forexample as coiiee, icecream, cottagecheese, etc.,although the invention will have'other uses and purposes as will beapparent to one skllledin the art.

This application application entitled 1944, Serial .No. 526,874, issuedin Letters Patent No. 2,416,813, March 4, 1947.

More particularly, the invention relates to a container having a,multi-thickness wall and a bottom construction that adds strength to thecontainer so as to enable the carrying of hot or cold substances for a.comparatively long time without material weakening oi. the container andwithout objectionable or unexpected change in the temperature of thesubstance carried, even though the container may be left standing upon atable with the full weight of the contents on the bottom of thecontainer.

In the past, many and various types of containers for hot or coldsubstances have been developed, but in the main such containers haveproved objectionable in that if the substance were left in thecontainer, especially a hot substance, for a considerable length of timeobjectionable weakening of the container occurred so that it wasdifficult to ultimately consume the contents directly from the containerwhen desired. In many instances this weakening occurred adjacent thebottom of the container enhancing the possibillty of leakage through thebottom of the container and in some cases rendering the wall adjacentthe container bottom somewhat flabby.

With that in mind, it is an important object of the instant invention toprovide a container in the nature of a flat bottom paper cup ofsubstantially truncated conical shape, having a multithickness wall, anda special bottom construction of a materially stronger characterthancontainers of this type heretofore known.

Another object of the invention is the provision of a container having amultl-thickness wall and a, multi-thickness bottom.

It is also an object of this invention to provide a flat bottom papercontainer having a multithickness wall and incorporating a flangedbottom member, with the lower margin of the multithickness wall turnedaround the flange oi the bottom member to give added strength to thecontainer.

is a division of my copending' Container, filed March 17,

rial isformed into a container. Accordingly, it is an object of theinstant invention to. provide a composite blank for a multi-thicknesscontainer which; blank may be made up of initially separatepieces,-eachtoo-small-toprovidethe same type of container'body of singlethickness, and the'composite blank may be formed into container shape onthe same typ-e'of'machines'that are now in I use for formingsingle-walled containers.

A further objectof the invention resides in the provision of a compositeblank for forming a double-walled container body, which blank is made upof initially separate pieces secured together in face-to-facerelationship and so disposed relatively to each other as to provide aheavy double bottom margin while permitting the rolling of a rim beadaround the mouth end of the container from single thickness stock.

While some of the more salient features, characteristics and advantagesof the instant invention have been above pointed out, others will becomeapparent from the following disclosures, taken in conjunction with theaccompanying drawings, in which- Figure 1 is a side elevational view ofa congainer embodying principles of the instant inven- Figure 2 is afront view of a composite blank from which the container of Fig. 1 mightbe made, also embodying the principles of this invention, andillustrated with the parts broken away to better show structuretherebeneath;

Figure 3 is an enlarged fragmentary projectional view shown in verticalsection of the lower portion of the container of Fi :1; and

Figure 4 is a fragmentary vertical""sectional view of the same form ofcontainer, utilizing the same composite body blank, but illustrating theuse of a double thickness bottom.

As shown on the drawings:

In that illustrated embodiment of this invention seen in Figs. 1, 2 and3, there is shown a truncated conical paper container generallyindicated by numeral I (Fig. 1). This container has a rim head 2 formedon the mouth which not only reinforces that end of the container, butalso renders it easy to drink from the container if so desired. Belowthe rim head there is another externalcircumscribing head 3 whichprovides a groove on the inside of the container for the reception of acap or cover pressed into the open end of the container to seal in thecontents until it is desired to remove them.

The body portion of the container I is of double thickness, and thisbody portion is made from a composite blank seen more clearly in Fig. 2.The composite blank comprises two initially separate pieces 4 and 5which are secured together in faceto-face relationship by adhesive 5disposed therebetween or equivalent means. Preferably, the pieces 4 and5 are undersized to the extent that neither of these pieces is ofsufilcient size to form a similar container having a single thicknesswall, but by arranging the pieces substantially in echelon as seen inFig. 2, the composite blank is of sufllcient overall size to provide acontainer having a double thickness wall.

The pieces are preferably so relatively arranged that their bottom edgesare flush or coincidental as indicated at I, and the pieces are ofsubstantially the same lateral width and laterally offset with respectto each other so that on one side a marginal portion 8 of the piece 4projects beyond the piece 5, and at the other side a marginal portion 9of the piece 5 projects beyond the piece I. It will also be noted thatthe piece 5 is higher than the piece 4 and accordingly projectsthereabove to the extent of a marginal portion III which is ultimatelyrolled into the aforesaid rim bead 2. In manufacture, it is much morefeasible to roll a rim bead from single thickness stock than to utilizedouble thickness stock, and the bead when rolled from the margin In isof ample strength.

The composite blank may be shaped into thecup body by means of known cupforming machinery of the same character that handles single pieceblanks. The composite blank is treated as though it were merely a singlethickness blank. When rolled into cup body formation, the piece 4 willbe the external piece and the piece 5 will be the internal piece. Twodiiferent joints in the cup wall may be provided, either a lapped jointor a butt joint. If a lap joint is provided a stripe of adhesive H ispreferably applied along a marginal portion of the inner piece 5 tosecure overlapping parts together and provide a side seam in the finishcontainer wall. It is deemed preferable, however, to provide a buttjoint or seam because the blank pieces may be of less size with such ajoint and thus results in a further saving of paper. In that event, thestripe of adhesive i l is omitted and the adhesive applied on the innerface of the piece I may be relied upon to secure the pieces together. Inthat event, the margin 8 will overlap the margin 9 so that the sideedges of each stock. One of these pieces may be a diflerent color thanthe other, and the outside piece may be decorated in any desirablemanner as by printing or other decorative embellishment.

Where a still stronger bottom construction is desired, a doublethickness bottom may be employed as illustrated in Fig. 4. In thisinstance, there are two bottom members It and I! each having a dependingflange, and the bottom member I1 is nested within the bottom member ii.The double thickness lower margin of the composite blank is then rolledaround both flanges of the two bottom members and secured to the flangesby means of the adhesive ll. With this construction, it is not necessaryto glue or otherwise secure the two bottom members It and I! together,but obviously they may be so secured together if desired.

From the foregoing, it is apparent that I have provided a novel papercontainer having a multithickness wall made from a composite blank thateifects a decided saving in paper. The container may be constructed onany suitable machinery of the character used in making single thicknesspaper containers and the actual forming operations are just aseconomical as though a single thickness paper container were being made.It will be further noted that the container set forth herein has anexceptionally strong and substantial bottom construction affording asolid base for the seating of the container, especially it hot or coldsubstances are to be maintained in the container for a considerablelength of time.

That bottom construction may be further strengthened by the utilizationof a double thickness bottom if so desired.

It will, of course, be understood that various details of constructionmay be varied through a wide range without departing from the principlesof this invention and it is, therefore, not the purpose to limit thepatent granted hereon otherpiece are in abutment with each other, thusleaving the seam only of double thickness the same as the rest of thecontainer wall.

Obviously, only a single winding of the composite blank is necessary toform the body portion of the container. The blank is rolled around abottom member l2 (Fig. 3) having a depending flange It. A stripe ofadhesive 14 is provided along the lower margin of the composite blankand then this double thickness lower margin is rolled around thedepending flange it of the -'bottom member as indicated at IS in Fig. 3,the

adhesive l4 securing the double margin to the flange iii. In thismanner, an exceptionally strong bottom construction for the container.is provided.

From the showing in Fig. 3 it will be noted that the two blank piecesneed not be of the same thickness not need they be or the same paperwise than necessitated by the scope of the appended claims.

I claim as my invention:

1. A fiat-bottom paper cup having a doubleply wall, including a flangedbottom member, and a 'body part comprising a composite blank made up ofa pair of initially separate pieces secured together before forming andcoinciding at the lower edges with a side margin of one extending beyondthe other and the opposite side and upper margins of the other extendingbeyond the first, the lower margins of both pieces being turned into abottom fold around the flange on the bottom member.

2. A composite blank for forming a flat bottom conlcally shaped papercup having a double ply wall, comprising a pair of initially separatepieces secured together in overlapped relationship, each of said pieceshaving arcuate top and bottom edges and side edges converging towardsaid bottom edges, said pieces being of substantially equal width andbeing positioned in said overlapped relationship with their bottom edgescoinciding so as to present a composite blank having a single-thicknessmargin along all but the bottom edge thereof, and said blank beingroliable into a cup in the same manner and by the same means as asingle-piece blank.

3. A composite blank for forming a paper container having a double-plywall, comprising a pair of initially separate pieces each of which isshorter than required for a single wall container of the same size andone of which is higher "than the other, each of said pieces having an 5arcuate top edge and arcuate bottom edge with side edges convergingtoward said bottom edge, said pieces being of substantially equal widthand being secured together face to face with the bottom edges thereofflush with each other and with g the lateral converging edges in echelonrelationship, leaving a single thickness margin at the top andconverging edges of the composite blank, and said blank being rollableintoa cup in the same manner and by the same means as a singlepieceblank.

CEBARE BARBIERI.

REFERENCES CITED The following references are of record in the file ofthis patent:

6 UNITED STATES m'rnm'rs Number Name Date Avery Oct. 29, 1867 Bower Oct.5, 1880 Brandt July 15, 1913 Reynolds Nov. 13, 1923 Benson Dec. 31,1929' Fox July 24, 1934 Barbieri Aug. 3, 1937 Barbieri Aug. 12, 1941Graves et a1 Mar. 23, 1943 O'Neil et al. Oct. 5, 1943

